Double-wall insulated tumbler



FIG. 1 is a top perspective view of a double wall insulated tumbler showing our new design;

FIG. 2 is an elevational view thereof at an enlarged scale;

FIG. 3 is a vertical sectional view of FIG. 2;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a double-wall insulated tumbler, as shown and described. 